Re: SCSI discovery update

Martin K. Petersen
2022-03-04T03:26:21Z

Doug,

> I believe Seagate never supported version descriptors. Hitachi/WD
> used to support them. But I have a WD SAS disk manufactured last
> month and it has no version descriptors.

I only have a couple of SAS disk drives in the lab that implement them
but almost all of my SAS SSDs feature version descriptors. As do, much
to my surprise, many USB devices.

The rationale behind adding the descriptor check is that it proved to be
a surprisingly good heuristic for "modern UAS device which handles unmap
and other fancy things correctly".

--
Martin K. Petersen Oracle Linux Engineering